Sliding sash window



Patented Sept. 23,

UNITED STATES i,599,707 PA'EENT OFFICE.

ERNEST L. BURKETT, 01.7 GBEENSBDRUGH, VECTORA, AUSTRALIA, ASSIGNOR 0FONE-HALF TO SIMON JOSEPH, 0F MELBOURNE, VICTORIA, AUSTRALIA.

SLIDING SASH WINDOW?.

Application filed .Tune 29, 1921. Serial No. 481,307.

To all whom t may concern.

Be it known that l, ERNEST Lun BURKETT, carpenter, a subject of theKing` of Great Britain and Ireland, and a resident of the ppst town ofGreensborough, in the shire of eidelberg, county of Evelyn7 State ofVictoria,` Commonwealth of Australia (whose post-office address is MainRoad, in the said post town of Greensborough), have invented certain newand useful Improvements in and Connected with Sliding Sash Windows, of.which the following is a specification.

'Ifhis invention relates to sliding sash windows and its primary objectis to dispense with the usual ropes or cords and pulleys at presentemployed to connect the balance weights with the sashes in such windows.Thus the well known disadvantages7 such for instance as the breaking ofthe weight cords,

attendant upon the use of such devices, is

overcome.

The invention is simple7V inexpensive and efficient and contains noparts liable to derangement. Furthermore, it may be fitted withoutdifficulty to existing as well as to new windows. 4

Referring to the drawings which form part ofthis specification Figure 11is a part sectional front view of the invention,

Figure 2 is a vertical section through the window frame the sashesb'eingremoved to show the toothed wheels inthe stiles.

Figure 3 is a cross section on line A-A. of Figure 1.

Figure 4 is a perspective view of one of the bearings for the toothedwheels.

Figure 5 is a plan of said bearing.

Figure 6 is a perspective view of a window sash according to theinvention.

Figure 7 is a perspective view of a balance weight in accordance withthe invention.

Figure 8 is a side view showing a modified construction of the rack onthe side of the sash.

Figure 9 is a part sectional front view of Figure 8.

In the drawings, the numeral 2 indicates the window frame which isprovided with the usual inner orv front beads 3, outerbeads 4 andintermediate beads 6 whereby the inner and outer sashes 7 and 8 areguided in their sliding movement along the stilcs 9. Formed within thewindow frame and behind the stiles 9 are the weight passageways 11 thetwo said passageways on each side of the window being separated by thepartie tions 12.

Vificcording to the invention there is formed through each of the stiles9 and approximately at the mid-length thereof, an opening 13. Into thisopening fits a bracket or bearing which is preferably constructed asshown in Figures 4 and 5 and comprises two opposite side cheeks 14having bosses 16 within which are formed open mouthed gul-v lets 17. Thehearings are also provided with ianges 19 in which are holes 21 toaccommodate screws 22 whereby the bearings are secured to the stileswith the side cheeks 14 disposed in the openings 13.

Accommodated in the opposite slots 17 of each hearing is the axle 23 ofa toothed or sprocket wheel 24, the teeth of said wheels projecting intothe weight passages 11 and also outwardly through the openings 13 in thestiles as in Figure 1. It will be evident from the foregoing that theopen mouthed slots 17 of the bearings permit of the toothed wheels beingreadily placed in and removed from the bearings when the sash isremoved.

In conjunction with the foregoing a toothed rack 26 is carriedpreferably on each side of each o f the window sashes. These racks maybe constructed of metal, fibre, or other suitable material and may belet into vertical grooves 27 formed in the sides of the sashes as shown.Said racks are adapted to engage the toothed wheels 24 in the windowframe. Two of said racks and toothed wheels are preferably provided foreach sash although it will be evident that the invention is capable ofoperation with a rack and toothed wheel on one side of the sash only.

Formed at the lower end of each sliding sash and on the inner sidethereof are rehates or recesses 28 which are adapted to pass over theprojecting parts of the toothed wheels 24 to permit of the sashes beingread* ily introduced into the upper part of the window frame and theracks 26 engaged with the toothed wheels.

Accommodated within each of the weight passage-ways is an elongatedbalance weight 29 of metal or other suitable material and having alongone of its vertical faces a toothed rack 31. The racks of these balanceweights engage the toothed wheels 24 in `lllaeh balance weight may, ifdesired, he provided with 'pockets or cavities 32 to hold shot or thelike whereby the weights may be rendered heavier or lighter according torequirements.

Iny a modification as seen in Figures 8 and 9 a vertical groove 33 isformed in each side of the window sash and is covered by a sheet `'metalplate 34 screwed or otherwise attached to the side of the sash.Apertures 36 are formed through that portion 0f the plate 34 which isdisposed over the groove 33 these `apertures, being preferably formedvby stamping or punching from the sheet Ymetal thus producing inwardlyprojecting tongues 37 which may abut against the b'ottom of the groove33 as shown and thus effectively reinforce the plate and form a restingsurface for. engagement with the teethot` the wheels 24 which projectthrough the apertures 36. This form of rack may be simply and cheaplymade and provides a strong and light construction.

In operation, as thesash is moved downwardly or upwardly the racksthereon rotate the toothed wheels which in turn cause the balanceweights engaging them to slide up jor down along lthe weight passagewaysin the opposite direction to the movement of the sash.

It will be evident from the foregoing that the toothed balance weightsact to retard or control the sliding movement of the sashes without theemployment of cords or ro es and pulleys as at present, thus renderingthe structure immune from deran ement through breakage of such cords orouliug of the pulleys.

The particular construction and arrangement of parts described andillustrated may obviously be altered or modified in various respects andadditional appurtenances or refinements may be introduced withoutdeparting trom the spirit and scope of the invention.

Having now described my invention what I claim as new and desire tosecure by Letters Patent is z- A bracket adapted to fit in an openingformed approximately mid-length the eentral beading of a sliding sashwindow` said bracket heilig of plate formation with a. centralgear-receiving opening having its side walls extended outwardly withrespect to the window sash, said walls being recessed to receive asupporting shaft, the recesses opening through the tace of the bracket,and to the gear receiving opening, a supporting shaft mounted in saidrecesses and limited in movement toward the rear of tho bracket andfreely movable toward the'face of the bracket, a gea;1 mounted on saidshaft yand extended in both directions beyond the bracket, and gearracks adapted to be secured to the window sash and operating weighttherefor, said racks being simultaneously and reversely operated in themovement of the gear.

In testimony whereof I my signature.

E. L. BURKETT. lVitness:

JACK NANo/n.

